| Alchemy Norway Holdco 1 AS | Manufacturing | 2024 |
| Alcides AS | Financial services | 2005 |
| Alcides Eiendom AS | Real estate | 1999 |
| Alcides Holding AS | Real estate | 1987 |
| Alcides Shipping AS | Real estate | 1991 |
| Alcina AS | Financial services | 2005 |
| Alcione Limited | Real estate | 2021 |
| Alco Eiendom 1 AS | Real estate | 2000 |
| Alco Eiendom 2 AS | Real estate | 2016 |
| Alco Eiendom 3 AS | Real estate | 2016 |
| Alco Holding AS | Real estate | 1973 |
| Alcotrack Norge AS | Wholesale & retail | 2018 |
| Alde Eiendom AS | Real estate | 2019 |
| Aldebaran Invest AS | Professional & scientific | 2007 |
| Alden 3 AS | Real estate | 2016 |
| Alden AS | Real estate | 2004 |
| Aldo Bil AS | Wholesale & retail | 2022 |
| Aldo Bygg & Radon AS | Construction | 2024 |
| Aldogruppen AS | Professional & scientific | 2022 |
| Aldrimett AS | Wholesale & retail | 2023 |
| Ale Eiendom AS | Real estate | 2025 |
| Ale International - Norway Branch Nuf | Wholesale & retail | 2015 |
| Aleap AS | Professional & scientific | 2016 |
| Aleap Fund I AS | Financial services | 2024 |
| Aleap Invest I AS | Financial services | 2022 |
| Aleap Ventures AS | Financial services | 2023 |
| Alechemist AS | Wholesale & retail | 2021 |
| Alecta Holding AS | Real estate | 2015 |
| Alefax AS | | 2020 |
| Alefe AS | Health & social care | 2014 |
| Aleksander Askeland Holding AS | | 2024 |
| Aleksander Chaibi AS | Health & social care | 2011 |
| Aleksander Hetland Invest AS | Real estate | 2019 |
| Aleksander Rem Holding AS | | 2025 |
| Aleksandra Invest AS | Administrative & support | 1990 |
| Aleksandrowicz Investments AS | Financial services | 2016 |
| Alektum Finans AS | Financial services | 2003 |
| Alem AS | Hospitality | 2016 |
| Alembik AS | Wholesale & retail | 2019 |
| Alen Norway Consulting and Service Limited | Professional & scientific | 2026 |
| Alente AS | Professional & scientific | 2026 |
| Aleph Kaph AS | Professional & scientific | 2005 |
| Aleph-Tau AS | Education | 2000 |
| Alera Capital AS | | 2025 |
| Aleris Helse AS | Health & social care | 1987 |
| Alerja AS | | 2024 |
| Alero AS | Professional & scientific | 2014 |
| Alert Film AS | Information & communication | 2009 |
| Alert Gladness AS | Arts & recreation | 2018 |
| Alessandra Music AS | Arts & recreation | 2023 |
| Aleste Holding AS | Financial services | 2017 |
| Alex AS | | 2021 |
| Alex Holding AS | Financial services | 2005 |
| Alex Invest AS | Real estate | 1991 |
| Alex Moen Holding AS | Professional & scientific | 2021 |
| Alex Rahaman AS | | 2020 |
| Alex Sushi AS | Hospitality | 1986 |
| Alex Sushi Holding AS | Hospitality | 2011 |
| Alex Sushi Products AS | Manufacturing | 2012 |
| Alex Sushi Service AS | Hospitality | 2011 |
| Alex Sushi Stavanger AS | Hospitality | 2013 |
| Alexa AS | | 2020 |
| Alexander & Ketil Auto AS | Other services | 1990 |
| Alexander Ege Holding AS | Financial services | 2005 |
| Alexander Eiendom AS | Real estate | 2025 |
| Alexander Energy AS | | 2021 |
| Alexander Granaas Invest AS | | 2021 |
| Alexander Rybak AS | Arts & recreation | 2010 |
| Alexander Tollerud Invest AS | | 2025 |
| Alexander Zarate Frez AS | | 2020 |
| Alexandersborg AS | | 2025 |
| Alexandra Hegard Prosjekt AS | Professional & scientific | 1992 |
| Alexandra Holding AS | Financial services | 2005 |
| Alexandra Ritzi AS | Wholesale & retail | 2018 |
| Alexandra Utvikling AS | Real estate | 2006 |
| Alexandria Ans | Information & communication | 2003 |
| Alexei AS | Information & communication | 2025 |
| Alexi AS | | 2019 |
| Alexion Pharma Nordics AB Nuf | Wholesale & retail | 2011 |
| Alexo Management AS | Professional & scientific | 2018 |
| Alexsis AS | Financial services | 2010 |
| Alexsten Invest AS | | 2020 |
| Alexx Norsk Transport AS | Transport & logistics | 2025 |
| Alexxo Invest AS | | 2021 |
| Alf Bjerckes Vei 10 AS | Real estate | 2006 |
| Alf Bjerckes Vei 10 Invest AS | Real estate | 2015 |
| Alf Bjerckes Vei 14 AS | Real estate | 2001 |
| Alf Bjerckes Vei 22- 26 AS | Real estate | 1997 |
| Alf Bjerckes Vei AS | Real estate | 2013 |
| Alf Bjerckes Vei Holding AS | Real estate | 2009 |
| Alf Herdlevær Byggkonsulent AS | Professional & scientific | 2012 |
| Alf Kristoffersens Vei 3 AS | Real estate | 2011 |
| Alf Kristoffersens Vei 7 AS | Real estate | 2011 |
| Alf Lie Motor AS | Other services | 2015 |
| Alf Lilly Capital AS | | 2025 |
| Alf Nabolagsbar AS | Hospitality | 2014 |
| Alf Strøm-Larsen AS | Manufacturing | 1978 |
| Alfa & Omega AS | Professional & scientific | 1983 |
| Alfa & Omega Service AS | Construction | 2016 |
| Alfa 2 AS | | 2022 |